用替代方法预测光纤光栅的可靠性

S. Kannan, P. Lemaire, Jerry Z. Y. Guo, M. LuValle
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引用次数: 2

摘要

自从发现光纤的光敏性以来,已经取得了许多进展,但没有一个可能比光纤光栅更重要。光栅是嵌入在光敏光纤芯中的调制折射率图案。在布拉格光栅中,沿着光纤长度传播的光被选择性地反射在满足布拉格条件的波长上。涉及前向传播包层模式耦合的长周期光栅是第二种光纤光栅。光栅最常写在掺锗硅芯的光纤中。在含硼[2]和锡[3]等共掺杂剂的锗硅酸盐纤维中,光敏性也得到了证实。也有研究表明,“加载”氢或氘的纤维,大大提高了它们的光敏性。这有利于易于写入光栅,即使在组合物中,否则是最低光敏的,例如,在磷掺杂的硅纤维[5]。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Reliability predictions on fiber gratings through alternate methods
Numerous advances have been made since the discovery of photosensitivity in optical fibers [1], but none perhaps more significant than fiber based gratings. Gratings are modulated refractive index patterns inscribed in the core of photosensitive optical fibers. In Bragg gratings, light propagating down the fiber length is selectively reflected at the wavelength which satisfies the Bragg condition. Long period gratings which involve coupling into forward propagating cladding modes are a second type of fiber based gratings. Gratings are most commonly written in fibers with germanium doped silica core. Photosensitivity has been also been demonstrated in germanosilicate fibers with codopants such as boron [2] and tin [3]. It has also been shown [4] that “loading” fibers with hydrogen or deuterium, greatly enhances their photosensitivity. This facilitates easy writing of gratings even in compositions that are otherwise minimally photosensitive, for instance, in phosphorus doped silica fiber [5].
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